enough power for a city the size of singapore for 50 years. what's it going to do to the planet? natural gas is the cleanest conventional fuel there is. we've got to be smart about this. it's a smart way to go. ♪ >>> more roundtable coming up. but first stephen colbert, his sister is running for congress. it's for real. >> quick advice for any of you republicans out there who might end up with a debate with my big sister. this is how i used to win a lot of arguements with her when i was a kid. right after she maybes a good point, repeat it back to her in a dumb voice like this. ooh, social security is a public trust to those who paid into it for their entire working lives. ooh, stop, stop copying me, stephen, i'm telling mom. [ laughter ] >> trust me, it works. hter ] >> trust me, it works. but there are some things i've never seen before. this ge jet engine can understand 5,000 data samples per second. which is good for business. because planes use less fuel, spend less time on the ground and more time in the air. suddenly, faraway places don't seem so...far away. ♪ a talkin